Planning a bathroom and kitchen interior renovation

I am planning a partial interior renovation for my bathroom and kitchen.
They told me that it would take about two weeks based on a full demolition,
and that the dust would fly so much that it would be impossible to live there,
so they recommended that I move out during the process.
Is this how it is usually done?
This is my first time doing a partial renovation while living in the house, and it seems like quite a big task..